Refactor auth to AuthHex

2026-08-25 16:46:05 +05:30
parent 916a2b8f0a
commit 97a1db1343
15 changed files with 561 additions and 81 deletions
@@ -0,0 +1,32 @@
+using System.Security.Cryptography;
+using System.Xml.Linq;
+
+namespace Distribution.Infra.Authorization;
+
+/// <summary>
+/// Parses an XML-format RSA public key (`&lt;RSAKeyValue&gt;...&lt;/RSAKeyValue&gt;`, as issued by
+/// AuthHex) into an <see cref="RSA"/> instance. Written by hand instead of relying on
+/// RSA.FromXmlString, which is Windows-only in .NET (throws PlatformNotSupportedException on
+/// Linux/macOS) — this keeps token validation portable across hosts.
+/// </summary>
+public static class RsaXmlKeyReader
+{
+    public static RSA ReadPublicKey(string xml)
+    {
+        var root = XElement.Parse(xml);
+        var modulus = root.Element("Modulus")?.Value
+            ?? throw new InvalidOperationException("RSA XML key is missing <Modulus>.");
+        var exponent = root.Element("Exponent")?.Value
+            ?? throw new InvalidOperationException("RSA XML key is missing <Exponent>.");
+
+        var parameters = new RSAParameters
+        {
+            Modulus = Convert.FromBase64String(modulus),
+            Exponent = Convert.FromBase64String(exponent)
+        };
+
+        var rsa = RSA.Create();
+        rsa.ImportParameters(parameters);
+        return rsa;
+    }
+}